WARNING in as102_dvb_dmx_start_feed

Status: upstream: reported C repro on 2026/03/26 09:14
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ecc90960c3d0af1ddfbb@syzkaller.appspotmail.com
First crash: 181d, last: 10h08m
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2026/03/28 upstream (ToT) 26df51adf30b C [report] WARNING in as102_dvb_dmx_start_feed
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 92 3h10m 181d 0/2 upstream: reported C repro on 2026/03/26 05:44
upstream WARNING in as102_dvb_dmx_start_feed prio:high usb media -1 syz, C error error 1372 1h40m 181d 0/29 upstream: reported C repro on 2026/03/26 05:13
linux-5.15 WARNING in as102_dvb_dmx_start_feed origin:upstream -1 syz, C error 55 50m 181d 0/3 upstream: reported C repro on 2026/03/25 18:11

Sample crash report:
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 1 PID: 4562 at kernel/locking/mutex.c:582 __mutex_lock_common kernel/locking/mutex.c:582 [inline]
WARNING: CPU: 1 PID: 4562 at kernel/locking/mutex.c:582 __mutex_lock+0xa1c/0xae0 kernel/locking/mutex.c:747
Modules linked in:
CPU: 1 PID: 4562 Comm: syz.4.76 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xa1c/0xae0 kernel/locking/mutex.c:747
Code: 04 20 84 c0 0f 85 b3 00 00 00 83 3d 65 5b e5 03 00 0f 85 f5 f6 ff ff 48 c7 c7 20 03 8c 8a 48 c7 c6 c0 03 8c 8a e8 e4 2b 12 f7 <0f> 0b e9 db f6 ff ff 0f 0b e9 89 f9 ff ff 48 c7 c1 40 61 c1 96 80
RSP: 0018:ffffc90003327ac0 EFLAGS: 00010246
RAX: 19d5185042794e00 RBX: ffff88802031ace0 RCX: ffff88802b7f3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90003327c20 R08: ffff8880b8e279db R09: 1ffff110171c4f3b
R10: dffffc0000000000 R11: ffffed10171c4f3c R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802031a000 R15: 0000000000000000
FS:  0000555583cc6500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e771eb840 CR3: 0000000079341000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x6c/0x280 drivers/media/usb/as102/as102_drv.c:139
 dmx_ts_feed_start_filtering+0x11c/0x210 drivers/media/dvb-core/dvb_demux.c:747
 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:656 [inline]
 dvb_dmxdev_filter_start+0x422/0x1060 drivers/media/dvb-core/dmxdev.c:767
 dvb_demux_do_ioctl+0x47e/0x530 drivers/media/dvb-core/dmxdev.c:1078
 dvb_usercopy+0x191/0x2b0 drivers/media/dvb-core/dvbdev.c:1007
 dvb_demux_ioctl+0x25/0x30 drivers/media/dvb-core/dmxdev.c:1187
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f05b539e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd65c71a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05b5625fa0 RCX: 00007f05b539e159
RDX: 0000200000000040 RSI: 0000000040146f2c RDI: 0000000000000004
RBP: 00007f05b543506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05b5625fac R14: 00007f05b5625fa0 R15: 00007f05b5625fa0
 </TASK>

Crashes (61):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/17 08:25 linux-6.1.y 1a8763b93150 95928915 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 09:54 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 06:30 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 06:26 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/23 00:59 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/22 20:37 linux-6.1.y 1a8763b93150 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/22 05:28 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/21 20:48 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/19 15:14 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/09/16 23:29 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/30 15:39 linux-6.1.y 4931e0e1673d a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/30 13:26 linux-6.1.y 4931e0e1673d a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/28 21:54 linux-6.1.y 7c87defbd336 95008c03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/28 10:08 linux-6.1.y 7c87defbd336 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/27 22:31 linux-6.1.y 7c87defbd336 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/27 22:30 linux-6.1.y 7c87defbd336 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/27 18:30 linux-6.1.y 7c87defbd336 0f700595 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/21 22:43 linux-6.1.y 7c87defbd336 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/21 22:43 linux-6.1.y 7c87defbd336 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/21 01:58 linux-6.1.y 7c87defbd336 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/21 01:57 linux-6.1.y 7c87defbd336 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/20 16:30 linux-6.1.y 7c87defbd336 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/20 16:28 linux-6.1.y 7c87defbd336 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/20 16:25 linux-6.1.y 7c87defbd336 e65da4ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/19 08:31 linux-6.1.y 7c87defbd336 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/19 08:29 linux-6.1.y 7c87defbd336 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/19 08:25 linux-6.1.y 7c87defbd336 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 18:34 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 18:34 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:56 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:56 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:54 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:54 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:29 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/13 11:28 linux-6.1.y 8e8fc038cad5 9530ccf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/12 18:27 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/12 14:29 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/12 14:28 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/11 00:09 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/10 14:21 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/10 14:19 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/10 10:38 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/04/10 10:36 linux-6.1.y 1989cd3d56e2 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/31 08:09 linux-6.1.y 1989cd3d56e2 d0af506e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:19 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:17 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:17 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:07 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:03 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 01:01 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/30 00:58 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 09:16 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
2026/03/26 09:13 linux-6.1.y 1989cd3d56e2 c6143aac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in as102_dvb_dmx_start_feed
* Struck through repros no longer work on HEAD.